Improvement in apparatus for molding dental-plates



Patented nec. 5,1871.

UNITED STATES PATENT GEErcE.

JOHN W. HYATT, JR., AND ISAIAH SMITH HYATT, OF ALBANY, NEW YORK, AS-

SIGNORS TO ALBANY DENTAL-PLATE COMPANY.

IMPROVEMENT IN APPARATUS FOR MOLDING DENTAL-PLATES.

Specication forming part of Letters Patent No. 121,522, dated December 5, 1871.

To all whom it may concern:

Be it known that we, JOHN W. HYATT, Jr., and ISAIAH SMITH HYATT, of the city and county of Albany and State of New York, have invented an Improved Appa-ratus for Molding Dental- Plates, of which the following is a speciiication:

Our invention relates to certain improvements in apparatus employed in the manufacture of sets of artificial teeth from collodion plates, produced according to the improved process described in Letters Patent N o. 113,055, and dated March 28, 1871, to which reference is here made for a description thereof.

In making a set of artiticial teeth according to this process, the prepared plates are placed within the flask and heated to the temperature of about 30()O Fahrenheit, which is most conveniently effected by placing the iiask and clamp in a vcssel containing oil and bringing the same to the required temperature, which softens and renders plastic the plate so as to enable it to be properly molde-d and attached to the teeth.

First, our invention consists of a flask-clamp, and a heating vessel constructed of a form in horizontal section corresponding more or less nearly with the base of the clamp so as to receive the same and hold it against turning, while it at the same time enables a small quantity of oil to suffice for the purpose of heatingthe iiask, thereby expediting the latter process, second, of a recess cast with the oil reservoir, and partially separated from the interior of the tank by projecting anges so as to form a convenient receptacle for a thermometer, by which the temperature ofthe liquid is determined.

In the accompanying drawing, Figure 1 is a sectional elevation of our improved apparatus. Fig. 2 is a similar view at right angles to Fig. 1. Fig. 3 is a plan view.

A is the flask-clamp, of ordinary construction, consisting of an oval base-plate, a, upright frame,

al, screw e2, operated by handle a3. B is aiiask of any suitable construction, in which the plates are molded. C is the oil-tank or reservoir, cast substantially oi' the form shown in Fig. 3, c being recesses at opposite sides to receive the ends ofthe press or clamps. D is a recess cast on one side of this vessel, and d d flanges projecting inward so as to partially shut off this recess from the interior of the vessel. E is a thermometer, represented and arranged in this recess. ff are legs by which the oil-tank is secured to thetable, and supported above the same so as to permit ofthe arrangement of a lamp or gas-jet thereunder, by which the oil is heated. The construction of the Vessel C, as just described, enables the clamp to be readily inserted and removed therefrom, while its form, corresponding with the base ot' the clamp, is such as to securely hold it against turning while the screw is being turned down in forcing the iiask together. The base ot' the clamp fitting close within the vessel enables a smaller quantity of oil (which is sooner heated) to be used than would be required it' the vessel were differently constructed. The recess forms a convenient receptacle for the thermometer, while the flanges d retain it in place.

IY hat we claim as our invention is l. The arrangement, with the iask-press A, of the heatingvessel U cast with recesses c or equivalent construction to receive and hold the press against turning, substantially as hereinbefore set forth. y

2. The recess D and iianges d cast with the flask-heating vessel A, and forming a receptacle for the thermometer, as hereinbefore set forth.

JOHN W. HYATT, J R. ISAIAH S. HYATT. 

